sept: commit working primary.

2019-02-20 04:52:11 -08:00
parent 85669ef491
commit 26f45fab19
34 changed files with 5744 additions and 10 deletions
--- a/sept/sept-primary/src/start.s
+++ b/sept/sept-primary/src/start.s
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+.section .text.start, "ax", %progbits
+.arm
+.align 5
+.global _start
+.type   _start, %function
+_start:
+    /* Set coldboot */
+    mov r0, #0x0
+    ldr r1, =0x7000E400
+    str r0, [r1, #0x50]
+    
+    /* Tell pk1ldr normal reboot, no error */
+    str r0, [r1, #0x1B4]
+    str r0, [r1, #0x840]
+    
+    /* Cleanup SVC handler address. */
+    ldr r0, =0x40004C30
+    ldr r1, =0x6000F208
+    str r0, [r1]
+    
+    /* Disable RCM forcefully */
+    mov r0, #0x4
+    ldr r1, =0x15DC
+    ldr r2, =0xE020
+    bl ipatch_word
+    
+    /* Patch BCT signature check */
+    mov r0, #0x5
+    ldr r1, =0x4AEE
+    ldr r2, =0xE05B
+    bl ipatch_word
+        
+    /* Patch bootloader read */
+    mov r0, #0x6
+    ldr r1, =0x4E88
+    ldr r2, =0xE018
+    bl ipatch_word
+    
+    ldr r0, =__main_phys_start__
+    ldr r1, =__main_start__
+    mov r2, #0x0
+    ldr r3, =(__main_size__)
+    copy_panic_payload:
+        ldr r4, [r0, r2]
+        str r4, [r1, r2]
+        add r2, r2, #0x4
+        cmp r2, r3
+        bne copy_panic_payload
+    
+
+        
+    /* Jump back to bootrom start. */
+    ldr r0, =0x101010
+    bx r0
+    
+    /* Unused, but forces inclusion in binary. */
+    b main
+    
+        
+.section .text.ipatch_word, "ax", %progbits
+.arm
+.align 5
+.global ipatch_word
+.type   ipatch_word, %function
+ipatch_word:
+    ldr r3, =0x6001dc00
+    lsl r0, r0, #0x2
+    lsr r1, r1, #0x1
+    lsl r1, r1, #0x10
+    orr r1, r1, r2
+    str r1, [r3, r0]
+    bx lr
+    
+.section .text.jump_to_main, "ax", %progbits
+.arm
+.align 5
+.global jump_to_main
+.type   jump_to_main, %function
+jump_to_main:
+    /* Just jump to main */
+    ldr sp, =__stack_top__
+    b main
+
+